Zobrazeno 1 - 10
of 143
pro vyhledávání: '"E. Challis"'
Publikováno v:
Insight - Non-Destructive Testing and Condition Monitoring. 58:536-543
Autor:
Yingqing, Deng, Elijah J, Petersen, Katie E, Challis, Savelas A, Rabb, R David, Holbrook, James F, Ranville, Bryant C, Nelson, Baoshan, Xing
Publikováno v:
Environmental sciencetechnology. 51(18)
Understanding the translocation of nanoparticles (NPs) into plants is challenging because qualitative and quantitative methods are still being developed and the comparability of results among different methods is unclear. In this study, uptake of tit
Publikováno v:
Universal Journal of Materials Science. 1:201-209
Ultrasonic NDE of case hardening of steel parts presents an attractive alternative to destructive assessment still used in industry. This experimental study showed that the ultrasonic assessment could be conducted by measuring two average times of fl
Publikováno v:
The Journal of the Acoustical Society of America. 132:3760-3769
This paper reports a study of the backscattered ultrasonic signal from a solid layer containing spherical cavities, to determine the conditions in which an effective medium model is a valid description of the response. The work is motivated by the ne
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 56:2504-2513
Proportionality between the ultrasonic wave attenuation coefficient in epoxies and other polymers and frequency is a commonly observed but little understood phenomenon. How it is ultimately explained will depend on the breadth of the frequency range
Publikováno v:
Insight - Non-Destructive Testing and Condition Monitoring. 51:82-87
With the rapidly escalating usage of composite materials, not only in military aircraft but in civil airliners as well, production NDT throughput is already stretched to its limit internationally. NDT data analysis is set to become the bottleneck pre
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 55:1992-2004
This paper is concerned with the design of magnetostrictive transducers for the excitation and detection of guided waves in metal pipes of small diameter (mm) and their application to the study of wave propagation in pipes filled with water or superc
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 54:1596-1605
This paper proposes a novel architecture for a data acquisition system intended to support the next generation of ultrasonic imaging instruments operating at or above 100 MHz. Existing systems have relatively poor signal-to-noise ratios and are limit
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 56:1329-1339
A cross-disciplinary experimental study related to both ultrasonic instrumentation and analytical chemistry is reported. The hydrolysis process was conducted by time-resolved titration in a fully automated manner. Acquired ultrasonic records were pro
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 56:1322-1328
Random interleaved sampling has become a widespread operating mode for digital storage oscilloscopes. Different repetitions of (notionally) the same waveform are recorded at random time shifts and are interleaved in memory, resulting in an increase o